But we don't currently live in a world that's powered by renewable energy, we live in a world where the vast majority of energy is generated from fossil sources

But we don't currently live in a world that's powered by renewable energy, we live in a world where the vast majority of energy is generated from fossil sources. Making that transition will require decades, billions in investment and a lot of challenging trade-offs. Here in the real world of 2019, energy is the dominant factor. If we need to dig up landfills to recover materials in 2100, so be it - right now, we have a ticking clock to mitigate the worst effects of the impending climate crisis. We simply cannot afford to waste time on wishful thinking and idealism, we need to cut our carbon emissions hard and fast.